Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/42—Details of containers or of foldable or erectable container blanks
  • B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
  • B65D5/563—Laminated linings; Coatings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
  • B65D5/22—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form held erect by extensions of one or more sides being doubled-over to enclose extensions of adjacent sides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
  • B65D5/24—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds
  • B65D5/244—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the outside of the container body
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/36—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/36—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
  • B65D5/3607—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank
  • B65D5/3635—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank by folding-up portions connected to a central panel from all sides to form a container body
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/40—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to contain liquids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/42—Details of containers or of foldable or erectable container blanks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/42—Details of containers or of foldable or erectable container blanks
  • B65D5/64—Lids
  • B65D5/68—Telescope flanged lids
  • B65D5/685—Telescope flanged lids having an inwardly or upwardly extending tab on the lid side wall cooperating with a tab on, or an opening in, the container side wall

Definitions

• the present invention essentially relates to the field of manufacturing cardboard packaging, especially for food products or products containing or evolving fats and moisture.
• the present invention relates directly to packaging products, in particular to packaging structures, which are containers made by die-cutting of a form of cellulose-paper material with a laminated layer, formed along fold lines and glued in such a way that double walls are formed as a result, and corner elements with a membrane placed between them in order to maintain and increase the tightness of the entire product.
• packaging structures which are containers made by die-cutting of a form of cellulose-paper material with a laminated layer, formed along fold lines and glued in such a way that double walls are formed as a result, and corner elements with a membrane placed between them in order to maintain and increase the tightness of the entire product.
• the outer walls are the support for all packages and are in contact with the surface on which the package is placed.
• the introduction of unique components of the whole packaging design is also aimed at attracting buyers to the food manufacturer.
• the cost of packaging in which food products are offered by the manufacturer also increases the final cost of the whole proposed product. Accordingly, the food manufacturer is interested in purchasing good quality packaging that excludes the leakage of fat and moisture.
• the essential distinctive features and advantages of packaging are increased product tightness, increased tightness period, lightness of construction combined with strength, the ability to preserve heat in the package and additional the use of various types of lids, a reduced amount of raw materials used in the manufacture, convenient transportation.
• Known patent JV WO / 2006/045212 which is a packaging made of cardboard, by folding the walls of the packaging for storage, transportation and / or presentation of items.
• the shape of the package has a bottom, side walls, a double lid and inward folding corners, each of which consists of four elements.
• the disadvantage of this packaging is that there is too much unlaminated cardboard material.
• the package has a double lid, which is a component of the entire structure, and therefore the bottom of the package has no variability in the use of various types of lids.
• the package does not have double walls for the stability of the entire structure.
• FR2821826 which is a cardboard box, made from almost a single solid sheet. At the same time, this package is made by folding and has a lid, which is a component of a single package sheet.
• the disadvantages of this package are also the absence of a laminated layer, the presence of a lid as a single component of the entire package, and single-layer walls that do not allow heat to be retained.
• Known application N ° KR160084612 which is a package made in the form of a cardboard box. This package has double walls and full cardboard corners. However, the cardboard package does not have a laminated layer and includes additional elements that are placed along the edge of the two walls of the package in such a way that they form a kind of small sidewall.
• N2JP3199310 is a package made of cardboard for fruits and vegetables. This package has corners and double walls. However, the disadvantage of this package is the absence of a laminated layer and the presence of slots, which do not allow maintaining the tightness of food products with increased moisture and fat.
• N ° WO / l 993/015962 is known, which is a tray as the base of the package, consisting of a bottom, four walls and corner elements.
• the disadvantage of this package is the absence of double walls, which are also very short, and the bottom is too wide, there are no locks that would allow the lid to be fastened to the base, and there is no laminated layer on the cardboard.
• N ° 2589674 which is a package consisting of a bottom and a shell.
• the shell is not single with the bottom, but is attached to the bottom by heat sealing, which still does not imply a single structure and increases the assembly time of the structure.
• the disadvantages of the known packaging options are the complexity in manufacturing, due to the large number of additional elements, the increased amount of material from which the packaging is made, the lack of tightness of cardboard packages and the possibility of long-term storage of moist and fatty food products.
• Many packaging structures are made from various types of cardboard, using various die-cut molds with further formation, both by attaching additional elements in the structure itself, and by gluing together parts of the structure.
• the design options available on the market have significant drawbacks, namely: (i) do not allow to reduce the amount of material used, (ii) have complex designs that increase the production time, (w) do not allow to extend the tightness of the cardboard packaging if oily or damp food products, (iv) do not allow to increase the preservation time of food in a warm state, and also do not allow to maintain both lightness and strength of the structure.
• packaging structures form slots during assembly, and the cardboard does not have a laminated layer, which, as a result, does not provide an airtight structure and does not allow food products with a high moisture and fat content to be placed in such packaging. Even if moist and fatty food is placed in such a package for a short period of time, due to its structure, the cardboard will get wet and cannot be used for a long time without damage to the appearance of the package and surrounding objects, and the moisture and fat released by the product can leak out into the openings ... Also, packaging may not be suitable for storing food products, in where the lid is part of the entire structure, since, due to the design features, the lid may not fit tightly to the side walls, and therefore, there are gaps in which foreign objects can fall.
• the process of creating packaging from cutting to assembly with further transportation should reduce the time of all stages while maintaining the quality of the packaging itself, including tightness, and aesthetically pleasing appearance.
• the technical result is an increase in tightness, long-term preservation of the heat of a food product placed in the package, strength and simultaneous lightness of a cardboard product with a laminated layer when using the package for its intended purpose and when stacking, reducing assembly time while maintaining tightness and aesthetically pleasing appearance of the package.
• the technical result is achieved by making a three-dimensional structure from a punching mold, during the assembly of which double side walls are formed, tightly adjoining each other due to additional elements, namely shaped petals and corner elements that form sealed membranes in the corners of the structure, and the outer wall becomes a support the entire structure, excluding contact between the bottom of the package and the surface on which the structure is located.
• the technical result is achieved due to the fact that the format of the structure allows it to be used both as an independent product and in conjunction with various kinds of covers, which additionally increase the tightness.
• One of the important tasks which is solved by the present invention, is to propose an optimal and accelerated way of assembling the package with the introduced additional elements aimed at increasing the tightness of the entire structure while maintaining the aesthetically pleasing appearance of the package.
• the present invention relates to the creation of a package and a manufacturing method.
• the packaging according to the present invention is made of cardboard.
• the packaging consists of two-layer cardboard, with the side which is in contact with food is covered with a laminated layer.
• the structure of the cardboard, the presence of double walls and all the necessary components allows you to get strong and at the same time lightweight packaging, which does not allow the cardboard to break and deform during operation.
• Bases for packages are made of cellulose and paper material, while one side of the package, which is in contact with food, is covered by lamination based on polymer materials such as polyethylene or polypropylene, or by lamination with a ready-made polymer film (polyethylene, polypropylene, polyethylene terephthalate or multilayer combined) using an adhesive or cellulose film.
• polymer materials such as polyethylene or polypropylene
• a ready-made polymer film polyethylene, polypropylene, polyethylene terephthalate or multilayer combined
• the packaging is made from a pre-cut blank (shape) of the required size, which consists of a bottom, double walls on each side, corner segments located between the walls, as well as additional elements in the form of curly petals on the sides in the upper part of the packaging walls.
• the packaging assembly method is produced by folding a flat blank along the fold lines.
• double walls are formed by bending horizontal lines in the central part of the wall, and further along the fold lines located between the side wall and the bottom, the package is formed into a three-dimensional structure.
• the side walls are folded along the creasing fold lines, on which additional curly elements are placed.
• the side walls are folded without additional elements and, taking into account the geometric dimensions of the package, such side walls in a small part overlap the additional elements of the adjacent walls.
• the side walls located opposite each other, have additional curly petals.
• these additional elements are aimed at improving the technical result both to increase the tightness of the entire structure as a whole, and to improve the fastening of the corner segments, since they actively participate in the packaging assembly process. In the event that this element were absent on the side walls, then the corner segments having a small area, after assembly, would not contribute to a reliable fastening of the package.
• the geometric shape of the additional element is calculated based on the size of the final package, since the area of the element must (i) be suitable in size in order to optimize the consumption of cardboard, (and) be slightly enlarged compared to the corner segments in order to overlap, (w) touch the side wall from the inside for the possibility of gluing to the wall and, accordingly, reliable fixation.
• Additional elements contribute to an increase in strength, as well as a longer use of the package as in a single placement on the surface, and when stacking (placing the packaging on top of each other).
• the volumetric structure is formed by pressing on the bottom of the package from the inside, which starts the process of connecting the side walls to each other. Due to the fact that at the previous stage, by alternately folding the side walls, additional figured elements appeared between the corner segment and the adjacent side wall, then in the process of pressing on the bottom of the package, the additional figured element and corner segments are smoothly placed between the double walls.
• a significant difference in the packing is the presence of an angular segment, which is a membrane (membrane), consisting of two V-shaped segments. Moreover, one of the segments does not have a cardboard layer.
• the corner element consisting of 2 V-shaped segments, one of which consists of cardboard and laminated layers, and the other only of laminated, together form a membrane (membrane), which as a result is aimed at preserving and significantly extending the tightness of the entire package.
• V-shaped segment consisting only of a film contributes to the achievement of a technical result aimed at increasing the tightness simultaneously with accelerating the assembly process.
• the membrane is part of the entire laminate layer applied to the surface of the package to prevent the pulp and paper base from getting wet when it comes into contact with food.
• the presence of one V-shaped segment, namely the membrane (membrane) without cardboard the base in this part allows you to assemble in the proposed way.
• the implementation of the corner segment with a completely cardboard layer would not contribute to the achievement of the claimed technical result, since the packaging would not remain flexible, lightweight, a larger amount of layer would be used, and a thick layer of cardboard would not be aimed at preserving the aesthetics of the entire structure due to the expansion of the double wall due to the excessive thickness of the folded material of the corner segments.
• the cardboard corner V-shaped segment pulls the corner V-shaped segment, consisting of a film, this accordingly makes it possible to structure the package, including the form in which its final appearance requires, namely the additional figured element and the corner segment are smoothly and easily inserted and fastened between the side double wall.
• the presence of one part of the angular V-shaped segment, consisting of a film, and the other angular V-shaped segment, consisting of cardboard contributes to tightness, acceleration of the assembly method, safety of life and human health, an increase in additional rigidity in this part, the presence of a smaller thickness of additional material, maintaining an aesthetically pleasing appearance.
• corner piece described herein can be used in a variety of different carton packaging formats to create a sealed base.
• the present invention is claimed in relation to a package to which a lid of various types and sizes can be attached having locks.
• the presence of double walls allows you to maintain tightness, since the locks on the lid are attached to the locks on the base of the package, which are of the appropriate size and shape of the slot.
• the presence of slots would not allow maintaining the tightness of the entire structure.
• the slots can also be made in the optimal and suitable size, which will ensure reliable fastening.
• the claimed solution is also aimed at increasing the duration of keeping food warm.
• the outer part of the side walls is increased in length, and therefore the formed projection does not allow the bottom to come into contact with the surface on which the package is placed.
• the air gap formed between the surface and the bottom of the base of the package, surrounded by side walls helps to keep food warm for a long time.
• the formed layer allows food to be kept warm for a longer time, in comparison with the solutions proposed in the prior art.
• the present invention does not limit the use of a pulp and paper material as a backing material. Considering the complete lamination of the inner surface of the package, which largely protects the frame material-base from moisture and fats released by food, other materials containing recycled pulp and paper products and waste paper can also be used as the frame material.
• the presence of the optimal number of all components of the package will allow you to create packaging, both with a different number of side walls, and different heights and sizes.
• the walls are increased in length or width, then for assembly purposes they may be changed only the dimensions of additional elements and corner segments without loss of tightness and assembly time of the entire structure.
• FIG. 1 shows a fully expanded packaging option. The image is shown from the inside of the package to which the laminate is applied.
• FIG. 2 shows an embodiment of a package in a flat state, where side walls are folded, having additional elements in the form of shaped petals, as the first stage of folding the package to form double walls. The image is shown on the inside of the package.
• FIG. 3 shows an embodiment of the package in a flat state, where the remaining side walls without curly petals are folded as a second stage in the formation of double walls. The image is shown on the inside of the package.
• FIG. 4 shows a variant of the package in a flat state and in a folded state of double walls with overlapping of a part of adjacent double walls and shaped petals. The image is shown from the outside (back) side of the package.
• FIG. 5 and 6 show a portion of the package showing that a corner V-shaped segment, consisting only of film, is folded and overlapped by a V-shaped segment of cardboard and film, which remains unchanged.
• the corner element with a shaped petal is pushed into the formed double wall of the package.
• FIG. 7 shows a pre-assembled package with a corner piece slightly open to show the formation of the corner piece.
• FIG. 8 shows a pre-assembled package showing the bottom of the package.
• a variant of the packaging form (Fig. 1) is made of a sheet cardboard blank with a laminated layer on one side of the cardboard in contact with food products, with the possibility of forming it when assembled into a bulk container.
• FIG. 1, 2, 3 show a flat blank from the inside of a package having a laminated layer that comes into contact with food.
• FIG. 4 shows a flat blank from the outer (back) side of the package from the bottom side.
• FIG. 1 shows a flat blank, where the bottom of the package 1 in this example is presented in the form of a square.
• the shape of the bottom can be of various sizes and formats.
• side walls 3 Za, 36
• wall Za is glued to wall 36 when folded along fold line 2 and due to pre-applied glue on the inner side walls
• FIG. 2 shows a flat blank with already formed double walls 3 and on which double walls 6 (6a and 66) are formed along the fold lines 5 without additional elements for overlapping part of the side wall 36 and shaped petals 4.
• FIG. 3 shows a flat blank with already formed double walls 3, 6 from the inside of the package.
• FIG. 4 shows a flat blank with already formed double walls 3, 6 from the reverse side, which shows that the side wall 36 and the shaped petals 4 are covered by the wall 66.
• FIG. 1, 2, 4 also show the locks 7 on the walls 36, 66, which are figured cuts and which, when folded, turn out to be on the outside of the package for the possibility of attaching the lid to the package.
• locks 7 can be of various sizes, types and quantities for the possibility of attaching different types of covers.
• cuts 7 may not be present on the package at all, if the package does not require a lid.
• FIG. 5, 6 show an enlarged view of the corner element 8, shaped petals 4 and side walls 3, 6, as well as showing the process of forming the tightness of the entire package when folded.
• FIG. 6 shows the process how from a flat state after alternately forming double walls 3, 6 with figured elements 4 when folding the package along lines 9 and creating a three-dimensional product, the figured element 4 located on the side wall 36 is pushed between the side walls 6a and 66.
• the corner piece 8 consisting of two V-shaped segments 8a, 86 also completely lies between the double walls 6a and 66.
• the corner V-shaped segment 8a consisting of a cardboard and a laminated layer, pulls a V-shaped segment 86, consisting only of a laminated layer and representing a membrane (membrane) for the formation of sealed corners of the product.
• the corner element 8 consisting of a cardboard part 8a and a membrane 86 and a figured petal 4 when assembled from a flat blank into a bulk product, they are placed between the double walls 6a and 66.
• FIG. 7, 8 show the assembled package, where the side walls Za, 36, 6a, 66 are formed in such a way that the figured element 4 is located between the walls 6a and 66.
• FIG. 8 shows a package where the side walls 36 and 66 are enlarged in relation to the bottom.
• the shaped elements 4 are covered by a side wall 66.
• the assembly process described above allows a sealed package to be formed and it should also be noted that the type of package shown is for this example.
• the types of packaging with double walls and sealed corners, where the described technology and materials are used can be any.
• Double walls and sealed diaphragm corners are formed from a flat blank into a bulk product.
• the advantage of the proposed packaging is the simplicity and accelerated assembly process, the presence of only the necessary additional elements to form at the same time the strength and lightness of the structure with an increased period of tightness of the package.

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• Mechanical Engineering (AREA)
• Cartons (AREA)

Priority Applications (2)

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Publications (1)

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ID=72926941

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Citations (12)

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• 2020
  • 2020-01-16 RU RU2020101623A patent/RU2733176C1/ru active
  • 2020-12-10 WO PCT/RU2020/000676 patent/WO2021145788A1/ru active Application Filing
  • 2020-12-10 EP EP20913774.4A patent/EP3936449B1/de active Active
  • 2020-12-10 CN CN202080012188.5A patent/CN113439060A/zh active Pending

Patent Citations (12)

Non-Patent Citations (1)

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